Furnace and boiler



2 Sheets-Sheet 1.

(No Model.)

' J. W. WALTERS.

FURNACE AND BOILER.

Patented Nov. 1, 1887.

lnvenzor:

"BM \N. Wan 5 WAN N. PLrERs, Pholo-LAhognphen Washington, D. c

(No Model.) 2 Sheets-Sheet 2. J. W. WALTERS.

FURNACE AND BOILER.

No. 872,584. Patented Nov. 1, 1887.

NIT ATES JULIUS \VM. WVALTERS, OF PORT RICHMOND, NEXV YORK.

FURNACE AND BCI LER.

SPECIFICATION forming part of Letters Patent No. 372,584, dated November 1, 188?.

Application filed March 5, 1887.

Serial No. 220,814. (No model.)

To all whom it may concern:

Be it known that I, JULIUs WM. WALTERS, of Port Richmond, in the county of Richmond and State of New York, have invented certain new and useful Improvements in the Construction of Steam-Boilers and Furnaces; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the 1etters of reference marked thereon, making a part of this specification, in which Figure 1 is a central vertical section of my improved combined furnace and steam-boiler taken in line transversely to the grate, with the boiler in elevation and the circulatingtubes in part removed; Fig. 2, a vertical section in line was of Fig. 1, with the boiler in elevation and all the circulating-tubes removed; Fig. 3, a horizontal section in line y y of Fig. 1, with the circulating-tubes all in place; and Fig. 4, a central vertical section transversely to the grate of a double boiler constructed in accordance with my invention, the boiler and baffle-plates being shown in elevation and the front circulating-tubes and apertures to receive them omitted from the drawings.

Similar letters indicate like parts in all of the figures.

My invention relates to an improvement in multitubular boilers and the combination thereof with a furnace.

It consists, first, in the combination, with a central body formed of two cylindrical heads and having preferably an intermediate contracted neck, and with a series of curved openended tubes of graduated lengths, secured at each end to said heads to communicate freely therewith and radiate therefrom in systematic order, of a transverse cylinder or steam-dome secured upon the upper head to commuicate freely therewith; and, second, in the combination, with said multitubular boiler, of lateral vertical battle-plates fitted parallel with the fire boX, to extend centrally from the lowerside of the steam-drum in line with the axis thereof to a point below the lower ends of the tubes and form a close partition between the body of the boiler and the sides of the outer casing inclosing it, whereby the heat, gases, and products of combustion from the fire-box are deflected from the underside of the steanrdrum down between the series of curved tubes on one side of the head and up between the tubes on the other, against and over the opposite side of thesteam-drum, all as hereinafter more fully set forth.

In the accompanying drawings, A represents a central hollow cylindrical body or vessel, preferably made of steel, and constructed, by preference, with a central inwardly curved and contracted portion, a, interposed between the two cylindrical ends or heads I) c. The lower end is closed by means of a head-plate, B, flanged and bolted thereon in the customary manner. The upper head, a, is fitted and united in the customary manner by a closelyriveted seam, d, to a transverse cylinder or drum, D, also preferably made of steel, with its ends solidly closed, as illustrated in the drawings. An equal number of similar holes are pierced concentrically in regular order in both the heads b and c, and the counterpart holes in the upper and lower series are severally united, as shown in Fig. 1, by an outwardly-curved connecting-tube, E. whose open ends are upset on the inner side of each head, in the usual-manner, to form a steam-tight joint therewith. The two heads b c are thus connected and free communication and circulation established between them by means of a series of these outwardly-curved radiallyprojecting tubes, E E E, and the steam generated therein is collected in the transverse steamdrum D above.

The boiler thus simply constructed is inclosed within an outer encirling casing, F, which is extended in front to inclose likewise a grate, G, and is closed at the top and fitted immediately above the steam-drum D with a smoke-stack, O. The grate G is separated at the rear from the concentric space encircling the boiler by a wall, H,of fire-b1'ick,cXtending from the gratebars up to about the height ol'the top of the tubes E E, and a metal plate, I, separates likewise the space or ash-pit beneath the grate-bars from the concentric space about the boiler. Suitable doors, JJ, are fitted in the front of the casing to communicate with the fire-box G above and the ash-pit 1 below the grate-bars.

Vertical bafflcplates or partitions K K are fitted to extend centrally from the under side of the steam-drum D in the plane of its axis down to about the middle of the lower head,

IOC

b, of the boiler, (see Figs. 1 and 2,) and are made to conform to and fit laterally against the body A of the boiler and also against the outer casing, F. The concentric space encircling the boiler is thus divided vertically by these baffle-plates KK into two chambers or passages, M and N, of which one, M, communicates directly with the fireboX G, while both of them communicate with the smoke-stack 0 above the steam-drum. Communication is established between the two chambers or passages M and N below the circulating-tubes only by means of the opening left under the baffle-plates. (See Figs. 1 and 2.) The communication of these chambers or passages M and N with the smoke-stack is controlled by means of a damper, I, hinged to the top of the steam-drum 'D,and adapted to swing over and close either the opening between the front passage, M, and the Smokestack, as shown in positive lines, Fig. 1, or between the rear passage, N, and the smoke-stack, as shown by the dotted lines in said Fig. 1.

In the operation of my improved furnace and boiler the heat and products of combus tion from the fire-box G may be left free to pass directly from the grate to the smokestack without contact with the boiler by throwing back the damper P, as shown in dotted lines, Fig. 1. By closing said damper, as shown by the positive lines in Fig. 1.the inflamed gases and hot air from the fire are made to strike, first, against one side of the steamdrum and thence diverted down on one side, M, of the body A of the boiler between and .around the circulating-tubes on that side,and

passing under said tubes around the lower portion of the lower head, I), and under the lower edge of the baffle-plates K K,are carried along the opposite side of the boiler among and around the tubes on said opposite sideand finally striking the opposite side of the steam drum will pass out at the smoke-stack. A complete circulation of the products of combustion is thus obtained from the fire-box around and over the entire heating-surface of the boiler, said heating'surl'ace being very greatly increased ,by reason of the radial arrangement of the curved tubes E E, in combination with the central body, A, while a very rapid and effective circulation is maintained within the boiler by reason of the connection of said tubes with the central water-space in the body of the boiler, this circulation being promoted by the contraction of the central portion of the body.

The steam formed in the tubes and body of .the boiler rising into the steam-drum D is, by

reason of the elongated form of the drum and its horizontal position transversely to the body A, completely freed from water and left perfectly dry, to be carried off to the engine through the delivery-pipe B.

Any mud or sedimentin the water is made, by the circulation thereof through the tubes E E, to settle into the lower head, I), which serves as a mud-drum, and may be blown off through a blow-off pipe, S, fitted thereto for the purpose. The feed-pipe T for. the boiler is connected, also, with the lower head, b. I

In arranging a number of the boilers in a battery the fire-box may be placed centrally between two or more of the boilers, as shown in Fig. 4, and the direct communication between the fire-chamber and the smoke-stack 0 above be controlled and cut off at pleasure by means of dampers l? P, whereby the circuit'of hot air and gases from the fire-chamber G may be made to pass down and around the boilers, substantially in the manner hereinbefore described. In this case the several boilers A A are connected at top and bottom by circulating-tubes W W, controlled by valves W W, and to which the steam-delivery pipe R is coupled at the top and the feed-water pipe T at the bottom.

In an application for Letters Patent which is pending herewith, Serial No. 210,855, filed August 14, 1886, I have described and claimed the combination, in a boiler, of a successive series of curved arched connecting-tubes of different length, with spheroidal heads at either end thereof, and hence do not herein claim, broadly, the within-described arrange ment of curved tubes, so far as the same is an equivalent for the arrangement and combination described in said application; nor do I claim the combination and arrangement of curved lateral tubes with a central vessel having a cylindrical body, and which is enlarged at one end, as is described in Letters Patent No. 65,280, dated May 28, 1867. My invention differs therefrom in that the central vessel is contracted between the upper and lower ends of the circulati ng tubes con nected thereto,

whereby the circulation through the tubes is greatly promoted and the efficiency of the boiler increased.

I claim as my invention 1. The combination, in a steam-boiler with IlO a central cylindrical chamber and with a series of outwardly curved or arched tubes fitted in said chamber to establish independent channels of communication between the two ends thereof, substantially in manner as described, of a transverse cylinder'or drum fitted upon the upper end of said central chamber, at a right angle thereto, to communicate freely therewith, substantially in the manner and for the purpose herein set forth.

2. The combination, with a central chamber, a series of outwardly-curved circulatingtubes connecting the upper and lower ends of said chamber, and an extended steamdrum fitted upon the upper end of the central chamber, at a right angle thereto, to communicate therewith, of an outer casing inclosing said chamber, tubes, and steam-drum, baffle-plates extending vertically from the under side of the steam-drum to or below the bottom of the circulating-tubes and. from the outer casing to the wall of the inner central chamber, a firebox upon one side of said-baffle-plates, a smokestackcommunicating with the space above the steam-drum, and one or more dampers controlling the passage connecting the smokestack with the space on either side of the baffle-plates, substantially in the manner and for the purpose herein set forth.

3. The combination, in a steam-boiler with a single central vertical chamber, of an extended cylinder or steam-drum fitted transversely across the upper end thereof to connect therewith, an inclosingeasing encircling the central chamber and the space above the drum, baffle-plates extending from the under side of the drum nearly to the lower end of the central chamber in the plane of the axis of the drum, a smoke-stack connected with the space above the drum, one or more dampers controlling the passages between the space on each side of the baffle-plates and the smoke stack, and a fire-box communicating freely with the upper end of one of said spaces, substantially in the manner and for the purpose herein set forth.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

JULIUS \VM. VALTERS.

Vitnesses:

S. A. STAVERS, A. N. J ESBERA. 

